Altimeters detecting elevation: “These sensors will tell people what floor they are on in a building, or could be used to more precisely determine where you are in relation to your friends on a location-based service,” says Vigna.

Heart monitors

Perspiration detection: to monitor excitement level and mood.

More microphones

Temperature sensors

Humidity sensors

Two applications mentioned in the article are

Games that react to one’s mood and excitement

Increasing security by identifying a user via the sensor data. This could also make banking safer.